This document includes requirements for warning devices used for notification in intrusion and hold up alarm systems installed in buildings. Four grades of warning device are described corresponding to each of the four security grades given in EN50131‑1 . Requirements are also given for four environmental classes covering applications in indoor and outdoor locations as specified in EN50130‑5 . This document does not deal with requirements for compliance with EC regulatory Directives, such as the EMC Directive, Low Voltage Directive, etc. except that it specifies the equipment operating conditions for EMC susceptibility testing as required by EN50130‑4 .